mog mn giải giúp
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X+78*X+25*X+X*4=78,6+121,4
X*1+78*X+25*X+X*4=200
X*(1+78+25+4)=200
X*108=200
X=200/108
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 78*x + 25*x + x*4=78,6 + 121,4
x*(1+78+25-4)=200
x* 100 =200
x = 200:100
x = 2
\(x+78\times x+25\times x-4\times x=78,6+121,4\)
\(\Rightarrow x\times\left(1+78+25-4\right)=200\)
\(\Rightarrow x\times100=200\)
\(\Rightarrow x=200\div100\)
\(\Rightarrow x=2\)
Vậy x=2
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x\) + 78 x \(x\)+ 25 x \(x\)- \(x\)x 4 = 78,6 + 121,4
\(x\)x 1 + 78 x \(x\)+ 25 x \(x\)- \(x\)x 4 = 200
\(x\)x ( 1 + 78 + 25 - 4 ) = 200
\(x\)x 100 = 200
\(x\)= 200 : 100
\(x\)= 2
X + 78 * X + 25 * X - X * 4 = 78,6 + 121,4
X * ( 1 + 78 + 25 - 4 ) = 200
X * 100 = 200
X = 200 : 100
X = 2
Vậy X = 2
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 78x + 25x - 4x = 78,6 + 121,4
100x = 200
x = 200 : 100
x = 2
![](https://rs.olm.vn/images/avt/0.png?1311)
y + 78 x y + 25 x y - y x 4 = 78,6 + 121,4
y x ( 1 + 78 + 25 - 4 ) = 200
y x 100 = 200
y = 200 : 100
y = 2
![](https://rs.olm.vn/images/avt/0.png?1311)
Dấu \("."\)là dấu nhân nhé !!!
\(x+78.x+25.x-x.4=7,6+121,4\)
\(\Rightarrow x.1+78.x+25.x-x.4=200\)
\(\Rightarrow x.\left(1+78+25-4\right)=200\)
\(\Rightarrow x.100=200\)
\(\Rightarrow x=200:100\)
\(\Rightarrow x=2\)
Vậy \(x=2\)
Chúc bạn học tốt !!!
![](https://rs.olm.vn/images/avt/0.png?1311)
X x ( 1 + 78 + 25 - 4) = 200
X x 100 = 200
X = 2
=>100x=200
=>x=2